/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraEmitterViewModel.h
typedef TMulticastDelegate_TwoParams< void, const [FEdGraphEditAction](API\Runtime\Engine\FEdGraphEditAction) &, const [UNiagaraScript](API\Plugins\Niagara\UNiagaraScript) & > FOnScriptGraphChanged